fix: Fix cquery targets filtering

[honnix]

Fixes #218

Convert Build.Target into BazelTarget first before applying the filtering. Doing so will make it easy to filter on name.

Note that e2e tests need to be fixed. Before I go fix those, I wanted to make sure this solution looks good. @tinder-maxwellelliott Please let me know what you think. Thanks.

Or maybe a more basic question: is this by design that cquery discarding source and generated targets, which query doesn't do?

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[tinder-maxwellelliott]

Looks great

[honnix]

It's surprising this source file appears here, but it is not filtered out by the starlark function. From my observation, it does have providers:

{"VisibilityProvider": <input file target //src/main/java/com/integration:GuavaUserAndroid.java>, "LicensesProvider": <input file target //src/main/java/com/integration:GuavaUserAndroid.java>, "FileProvider": , "FilesToRunProvider": <unknown object com.google.devtools.build.lib.analysis.FilesToRunProvider$SingleExecutableFilesToRunProvider>}

[honnix]

I deleted that comment in a later commit